This gem was uttered by James Clapper, the former Director of National Intelligence, on CNN’s The Axe Files with David Axelrod. It is a mashup of “double-edged sword” (something that can be both beneficial and problematic) and “two-way street” (a situation where both sides must put forth an equal amount of effort to get a desired result). The reason for the mixup is obvious: “double” means “two”. Also, the two expressions are close in meaning. A big thanks to James Kozlowski for hearing this one and sending it in.

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